Bench-clamp.



I PATENTED MAY 16, 1905.

NORM n88;

W. W. COOK.

BENCH CLAMP.

APPLIQATION FILED SEPT. 8, 1904.

Patented May 16, 1905.

PATENT OFFICE.

WILLIAM COOK, OF ATLANTA, GEORGIA.

BENCH-CLAMP.

SPECIFICATION forming part of Letters Patent No. 790,188, dated May 16,1905. Application filed September 8, 1904. Serial No. 223,779.

To all whom it may concern.-

Be it known that .1, WILLIAM W. OooK, a

citizen of the United States, residing at At. lanta, in the county ofFulton and State of Georgia, have invented certain new and use-1 fulImprovements in Bench-Clamps; and I do of an adjustable bench-rest andclamp constructed more particularly to support the rear ends ofpanel-boards or articles of a similar nature while their edges are beingfinished and straightened.

. The objects of this invention are to improve on a device of suchcharacter by making the same adjustable so as to suit any length ofboard from the vise to the full length of the bench and also any"thickness of board within reasonable limits, clamping the same firmlyin position against the bench;

A further object is to provide an attachment or device of the characternamed which will be simple, strong and durableflnexpensive tomanufacture, and well adapted to the use for which it is designed.

To the accomplishment of these objects and such others as mayhereinafter appear the invention comprises the novel construction andcombinations of parts hereinafter described, and particularly pointedout in the appended claims, reference being had to the accompanyingdrawings, showing the preferred embodiments thereof, wherein the samereference characters designate like parts throughout the several views,and in which Figure 1 shows an elevational view of one side of theinvention. Fig. 2 shows a plan view of the invention, and Fig. 3 showsan elevational sectional view on line 3 3 of Fig. 2.

Referring to the drawings, (t represents a portion of a work-bench towhich the device is attached; 6, a member, preferably in the form of arack provided with teeth 0, constructed to allow a free movement in onedirection of the member d, which forms a rest, and also carries a membera, which acts as a clamping-jaw. The panel or other article acted uponis represented at f, Fig. 1. The supporting member 6 is preferablyattached to a face of the work-bench by any suitable means in asubstantially vertical position and may be flared outwardly in the formof a dovetail adapted to fit into a similar groove formed in one edge ofthe rest d, as shown at g, thus allowing member all to be verticallyadjustable on member 6. Suitably secured to member (Z, preferably withina recess 7b conveniently located, is a key or pin z', constructed toengage with the teeth 0 and hold the member'd in any desired position ofvertical adjustment. This key is provided with a coiled spring 1', woundabout a portion of its shank, or any other suitable and convenient meansfor keeping the key in close engagement with the teeth. When placed in agroove, as shown, the shank projects outside the member 0? and isprovided with a.

suitable operating-handle, as a button 70. The formation of the teeth 0is such that the rest cl is readily adjustable in one direction ofmovementthat is, the upwardwithout manipulation of the key 71; but tomove the rest downwardly the key must first be removed from engagementwith the teeth on the member 72, when it will fall by gravity. Themember (Z is also provided with a number of guideways, preferably in theform of ribs Z, two being here shown, (see Fig. 2,) which arealternately disposed on opposite sides of said member and at varyingdistances from its inner face d and extend from top to bottom thereof ata predetermined angle to said inner face, the distance of the top of theribs being greater than the distance of their bottoms therefrom. Theseribs are preferably in the form of a dovetail in cross-section; but this,is not essential.

The clamping or wedging jaw e is provided with means for engaging theguideways on the member d, as grooves m, one in each face, and are soformed that they fit snugly on the ribs Z and have a sliding movementthereon. The grooves m are placed at a similar angle with reference tothe face a of jaw e as the ribs l are placed with reference to the face(1 of the rest (Z. It is then readily seen that as the jaw a is movedupwardly or downwardly upon the inclined ribs Z the space between saidjaw and the member 6 or workbench a grows either greater or less, theface 6' of said jaw being brought into successive parallel verticalplanes.

In case dovetail or other locking ribs Z and grooves m are not usedmeans independent cally adjusted until the same is in proper positionabove the top of the work-bench, when the piece is clamped or wedgedfirmly against the bench by means of jaw e. The various ribs Zare foraccommodating various widths of workpieces-that is, if the same wouldproject beyond the first rib the jaw is shifted to the next rib fartherout, which is preferably located on the other side of rest (Z, as thisallows of a greater and more accurate range of adjustment, and so on forgreater widths.

l/Vhile the invention has been described with particular .reference tothe details of v construction, it should be understood that it is not tobe limited thereto, as many and various changes, alterations, andsubstitut1ons may be made therein and still fall within its scope andprinciple; but

hat I do claim, and desire to secure by Letters Patent, is

1. In a bench-clamp, a suitably-s11pported work-rest provided withdiagonally-arranged parallel guideways extending from top to bottom ofeach side and alternately disposed at varying distances from one end ofsaid rest, and a clamping-jaw constructed to engage with and be guidedby any of said ways in its movement, substantially as described.

2. In a bench-clamp, a suitably-Snpported work-rest provided withdiagonally-arranged parallel guideways extending from top to bottom ofeach side and alternately disposed at varying distances from one end ofsaid rest, a clamping-jaw constructed to engage with and be guided byany of said ways in its movement, and separate means for holding saidjaw in any desired position, substantially as described.

3. In a bench-clamp, a suitably-sup 'iorted work-rest, provided withdiagonally-arranged ribs on each side alternately disposed at varyingdistances from one end of said rest, and a clamping-jaw having a pair ofdiagonallyarranged grooves oppositely disposed.in its sides constructedto engage said ribs and obtain a diagonally-sliding movement bringingits clamping-face into successive parallel vertical planes,substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

WILLIAM \V. COOK.

Witnesses:

J. IV. KILrA'rRIoK, J. P. Boone.

